probability distribution

how would i prepare a probability distribution of the X variable for this question?

You have a biased coin or unfair coin, such that, on each toss, the probability of observing a head is 0.25 and the probability of observing a tail is 0.75. Let X be the variable = number of heads observed in 4 tosses.

how would i prepare a probability distribution of the X variable for this question?

You have a biased coin or unfair coin, such that, on each toss, the probability of observing a head is 0.25 and the probability of observing a tail is 0.75. Let X be the variable = number of heads observed in 4 tosses.